14 mm thread Dia, 3/8 in reach, 3/4 in hex socket. Quicker starts, Saves on fuel and reduces emissions. Replaces Champion 5846, CJ8Y, CJ14, RCJ18Y. Replaces NGK BM6F, BM7F, BPM6F, BPMR6F. Replaces Autolife 258, 2976, XST258. XST2976.
